Dual-Camera Lens Drive Layout for OIS Magnetic Isolation
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Solution Overview
Problem
Dual camera devices face challenges in reducing the separation distance between the optical axes of the two cameras due to magnetic field interference, making it difficult to deploy them in proximity.
Innovation Solution
A lens driving device is designed with a specific configuration of magnets and coils that minimizes magnetic field interference, allowing for closer placement of the cameras without interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If two camera devices are deployed in a dual camera device, then the ability to photograph different portions and combine images is improved, but magnetic field interference occurs between the cameras
Solution Approach 1:
A non-magnetic partition wall is introduced as an intermediary structure between the two camera devices. This partition wall acts as a mediator that blocks magnetic field lines from one camera from interfering with the other camera, while still allowing the cameras to be positioned close together in the dual camera configuration.
Solution Approach 2:
The internal space of the dual camera device is segmented into separate regions for each camera using a partition wall. This segmentation isolates the magnetic fields of the two cameras into distinct spatial zones, preventing magnetic field interference while maintaining the dual camera functionality.
2Volume of moving object
If the separation distance between the optical axes of the two camera devices is decreased, then the device size is reduced, but magnetic field interference increases
Solution Approach 1:
The non-magnetic partition wall serves as a mediator that enables the two cameras to be positioned with minimal separation distance without experiencing magnetic field interference. The partition wall blocks magnetic field lines, allowing the cameras to be placed closer together than would otherwise be possible.
Solution Approach 2:
Instead of increasing separation distance in the horizontal plane to reduce magnetic field interference, the solution introduces a vertical dimension by placing a partition wall between the cameras. This dimensional approach allows close spacing while maintaining magnetic field isolation.
3Reliability
If magnets are used for Optical Image Stabilization (OIS) in dual camera devices, then OIS functionality is achieved, but magnetic field interference occurs between the magnets
Solution Approach 1:
A non-magnetic partition wall is positioned between the magnets of the two camera devices to block magnetic field lines. This partition wall allows each camera to maintain its OIS functionality using magnets while preventing the magnetic fields from interfering with each other.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively eliminates magnetic field interference when driving Optical Image Stabilization (OIS) in dual camera devices, enabling a reduction in the size of the camera module by minimizing the gap between auto focus actuators.
Implementation Method 1
a coil and a magnet that face each other, the coil being disposed on the bobbin
Data Source
AI summary
The present embodiment relates to a lens driving device comprising: a housing comprising a first hole and a second hole; a first bobbin disposed in the first hole of the housing; a second bobbin disposed in the second hole of the housing; a first coil disposed on the first bobbin; a second coil disposed on the second bobbin; a first magnet disposed in the housing to face the first coil; a second magnet facing the second coil; and a third magnet disposed between the first coil and the second coil.